Y \ X
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
9370
9369
9368
9367
9366
9365
9364
9363
9362
9361
9360
9359
9358
9357
9356
9355
9354
9353
9352
9351
9350